Valve.



0. H JARVIS.

VALVE.

nruonron FILED JAN. 5, 1911.

Patented Dec. 5, 1911 COLUMBIA PLANOGRAPH 60-,WASHINGTON. D. c.

UNITED STATES PATENT OFFICE.

CHARLES JARVIS, OF CHARLOTTE, MICHIGAN, ASSIGNOR TO HARRY W. HANCOCK, OFCHARLOTTE, MICHIGAN.

VALVE.- 7

Specification of Letters Patent.

Patented Dec. 5, 1911.

To all whom it may concern:

Be it known that I, CHARLES H. JARVIS, a citizen of the United States,residing at Charlotte, in the county of Eaton, State of Michigan, haveinvented certain new and useful Improvements in Valves; and I do herebydeclare the following to be a. full, clear, and exact description'of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

My invention relates tovalves, and more particularly to new and usefulimprovements in valves for internal combustion motors, and the object ofmy invention is to provide'a valve which will be close fitting at alltimes, and a further object is to provide a valve which willautomatically ex pand to take up its wear.

With these and other objects in view my invention consists in general ina controlling valve for internal combustion engines, main tained inproper bearing relation to its complemental casing and ports by thefluid which it governs. And my invention still further consists in acontrolling valve for fluid pressure engines formed in sectionscushioned apart by the fluid which it controls, the area of thecushioned surfaces being greater than the surfaces subject to theadmitted fluid.

Referring more particularly to the drawings which accompany and form apart of this application, Figure 1 is a central longitudinal section ofthe valve casing and valve. Fig. 2 is a transverse section on the line22 of Fig. 1. Fig. 3 is a side elevation partially in section showingthe valve removed from its casing.

Referring more particularly to the drawings which show a preferredembodiment of my device 1 designates in general, a water cooled valvecasing which may be of the customary or any preferred type and which isprovided with the usual cylindrical valve seat 2 in which is seated thevalve, which in its entirety is designated 3.

Opening upon the valve seat 2 upon either side thereof, are the ports 4which ports are connected to the cylinder of the motor by suitablepassages not shown in the drawings. The lower part of the valve casing 1is also provided ,with an inlet port 5, while the upper part of thecasing has an exhaust port 5.

The valve rod 6 isthreaded near its end and provided with the internallyand externally threaded collar 7 having an annu- A lar flange 8 and aset nut 9 for holding the collar 7 in place. A valve frame 10 consistingof the top member 11, base member 12 and side members 18 has a centrallylocated threaded aperture in its base 12 adapt- .ed to screw over thecollar 7 of the valve rod 6 thereby joining the valve rod to the frame.A helical spring 14 is seated upon the top of the collar 7 surroundingthe end 1 of the valve rod 6. A clamping member 15 is slidably mountedupon the side members 13 of the frame 10 and rests upon the top of thespring 14.

Referring more particularly to the valve construction it will be seen,that the valve proper consists of two members 16 and 17,

slidably mounted upon the side members 13 of the valve frame 10, saidmembers being held against the top of the frame by the clamping member15 which in turn, is held in place by the spring 14. It will be apparentthat the force exerted against the clamping member by the spring 14 maybe regulated by means of the threaded collar 7 and the set nut 9. V

' As will be seen by referring to the drawings the valve consists of twomembers 16 and 17, said members having their outer faces fitted to bearagainst the cylindrical valve seat 2. The inner face of the valve member16 is enlarged as at 18 and provided with a centrally located socket 19,while the inner face of the valve member 17 is enlarged as at 20 andprovided with the outwardly extending portion 21 adapted to fit closelywithin the socket 19 of the valve member 16 leaving a slight, space 22between the base of the socket and the extension 21, the surroundingportions of said inner faces bearing against each other when the membersare in assembled position. The valve member 16 is provided with alongitudinal passage 23 leading from the port 24 in its socket 19 to theport 25 in its outer face. The outwardly extendin portion 21 of thevalve member 17 is provided with a port 26 registering with the port 24of the member 16, a passage 27 connecting this port 26 with the port 28in the outer face of the valve member 16. These ports 25 and 28 areadapted to register with the cylinder ports 4 of the valve seat 2 whenthe valve is in its closed position. The inner portions of the valvemembers 16 and 17 are enlarged as described, in order that the areas ofthe inner faces of the socket 19 and the extension 21 shall be greaterthan the areas of the portions of the outer valve faces subject'topressure through the cylinder ports 4.

In operation the valve 3 reciprocates in its seat 2 in the customarymanner, permitting the cylinder to be alternately charged through theports at and 5, and discharged through the ports 4 and 5, the operationthus far being identical with that of the usual valve of this type.

My invention resides in the fact that each time the valve ports 25 and28 register with the cylinder ports 4: the cylinder gases will pass bythe ports 25 and 28 and the passages 23 and 27 into the socket recess 22between the valve members. As the areas of the faces of this recess aregreater than the areas of the cylinder ports I the pressure in therecess 22 tending to separate the valve members 16 and 17 will begreater than the pressure on the outer faces of these valve members.This pressure will cause the valve to fit closely in its seat 2 at alltimes, and will also cause the valve to take up its own wear.

It will thus be seen that I have constructed a valve formed in sections,said sections being adapted to be cushioned apart by the pressure of thefluid which it governs, and it will be further seen that in a valve soconstructed, the greater pressure to which it is subjected, the moreclosely it will engage its seat.

What I claim is:

1. A valve for fluid pressure engines, comprising, a frame having top,bottom and side members, a valve rod adjustably secured to said bottommember, a spring carried by said valve rod, a clamping member slidableon said frame and controlled by said spring, and coupled membersslidable in said frame and clamped against the top thereof by saidclamping members, and transverse passages through said members, saidpassages being in alinement when said members are in their coupledposition.

2. In an internal combustion motor the combination with a valve seat, ofa valve loosely engaging in said seat and comprising a plurality ofmembers, and fluid pres sure means acting upon said valve only duringcompression and working strokes to forcibly extend its members to engageclosely with said valve seat.

3. In an internal combustion engine the combination with a valve seathaving cylinder ports therein, of a valve reciprocally mounted in saidseat, said valve comprising two members, one member having a cylindricalsocket in its inner face engaging a cylindrical extension upon the innerface of the other, and bores through said members communicating in saidsocket, and adapted to register with the cylinder ports in one positionof the valve.

4. In a fluid pressure engine the combination with a valve seat having acylinder port therein, of a valve loosely engaging in said seat andcomprising a plurality of members, and fluid pressure means acting uponsaid valve only during the time the cylinder port is closed to forciblyextend its members to engage closely with the said valve seat.

In testimony whereof, I aflix my signature, in presence of twowitnesses.

CHARLES H. JARVIS.

Witnesses:

ARCHIE L. DITTMORE, LEWIE MOCONNELL.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. 0.

